87553441 has 2 divisors, whose sum is σ = 87553442. Its totient is φ = 87553440.

The previous prime is 87553439. The next prime is 87553447. The reversal of 87553441 is 14435578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 672400 = 9321^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 87553441 - 2¹ = 87553439 is a prime.

Together with 87553439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87553441.

It is not a weakly prime, because it can be changed into another prime (87553447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43776720 + 43776721.

It is an arithmetic number, because the mean of its divisors is an integer number (43776721).

Almost surely, 2^87553441 is an apocalyptic number.

It is an amenable number.

87553441 is a deficient number, since it is larger than the sum of its proper divisors (1).

87553441 is an equidigital number, since it uses as much as digits as its factorization.

87553441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 87553441 is about 9356.9995725125. Note that the first 3 decimals coincide. The cubic root of 87553441 is about 444.0423643396.

The spelling of 87553441 in words is "eighty-seven million, five hundred fifty-three thousand, four hundred forty-one".